April weather in Port Jefferson, NY
The average temperature in Port Jefferson in April is 53.2°F (42.8°F–63.7°F). Average precipitation: 4.42 inches.
April is a spring month in Port Jefferson, and is cooler than the annual average of 54.7°F. Daily temperatures swing about 20.9°F between overnight low and afternoon high. Daylight averages about 13h 6m. For travel, April is a comfortable month to visit.
Avg High
63.7°F
Avg Low
42.8°F
Precipitation
4.42 in
Daylight
13h 6m
April records in Port Jefferson
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| April 1 | 66.0°F (2006) | 27.0°F (2008) | 1.05 in (2021) |
| April 2 | 68.0°F (2010) | 26.1°F (2015) | 1.46 in (2005) |
| April 3 | 68.0°F (2002) | 23.0°F (2008) | 0.78 in (2024) |
| April 4 | 73.9°F (2010) | 27.0°F (2013) | 1.60 in (2017) |
| April 5 | 72.0°F (2025) | 25.0°F (2016) | 0.82 in (2006) |
| April 6 | 73.9°F (2010) | 21.9°F (2016) | 1.27 in (2017) |
| April 7 | 90.0°F (2010) | 23.0°F (2007) | 0.20 in (2016) |
| April 8 | 81.0°F (2010) | 30.0°F (2007) | 1.05 in (2014) |
| April 9 | 80.1°F (2013) | 28.0°F (2016) | 0.68 in (2020) |
| April 10 | 75.9°F (2013) | 28.0°F (2007) | 0.20 in (2015) |
| April 11 | 73.9°F (2010) | 24.1°F (2007) | 0.38 in (2013) |
| April 12 | 72.0°F (2017) | 34.0°F (2005) | 1.70 in (2007) |
| April 13 | 75.9°F (2018) | 34.0°F (2005) | 3.10 in (2004) |
| April 14 | 75.9°F (2018) | 30.9°F (2016) | 0.51 in (2004) |
| April 15 | 81.0°F (2002) | 34.0°F (2016) | 1.27 in (2019) |
| April 16 | 91.0°F (2002) | 30.9°F (2008) | 2.22 in (2018) |
| April 17 | 95.0°F (2002) | 28.9°F (2005) | 2.49 in (2011) |
| April 18 | 84.9°F (2002) | 36.0°F (2014) | 0.33 in (2024) |
| April 19 | 84.9°F (2002) | 36.0°F (2005) | 1.52 in (2022) |
| April 20 | 86.0°F (2005) | 35.1°F (2018) | 1.12 in (2015) |
| April 21 | 75.9°F (2007) | 30.9°F (2014) | 0.45 in (2020) |
| April 22 | 75.9°F (2007) | 24.1°F (2020) | 1.00 in (2019) |
| April 23 | 78.1°F (2007) | 24.1°F (2020) | 5.15 in (2006) |
| April 24 | 77.0°F (2008) | 32.0°F (2002) | 0.74 in (2020) |
| April 25 | 73.9°F (2008) | 34.0°F (2015) | 0.60 in (2010) |
| April 26 | 75.0°F (2011) | 32.0°F (2024) | 1.04 in (2004) |
| April 27 | 73.9°F (2019) | 36.0°F (2024) | 1.67 in (2019) |
| April 28 | 82.0°F (2017) | 34.0°F (2012) | 1.90 in (2008) |
| April 29 | 84.0°F (2017) | 35.1°F (2006) | 1.53 in (2023) |
| April 30 | 78.1°F (2007) | 35.1°F (2006) | 0.88 in (2023) |